Senior Software Engineer - Machine Learning (Remote US)

4 hours, 16 minutes ago
Full-time
Senior
Software Development
Legion Intelligence

Legion Intelligence

Legion Intelligence is a software company based in San Francisco, founded in 2022. The company specializes in creating an enterprise-wide agent-orchestration platform designed to translate human intent into coordinated actions for clients in defense, government, and secure enterprises. Their mission is to enable organizations to operate at machine speed while maintaining human oversight and control. The primary offering is the Legion Platform, a secure and model-agnostic system that integrates various data sources and legacy applications. Key features include governed AI for auditability, compliance with security standards, and workflow automation for tasks like intelligence analysis and mission planning. Recently, Legion expanded its portfolio with edge AI solutions, including the Centurion III, an ultra-small edge AI system for challenging environments, and tailored AI software packages for military functions. Legion Intelligence serves national security organizations and defense agencies, including the U.S. Department of War and U.S. Special Operations Command. The company has gained trust from over 70,000 users across these agencies, emphasizing its commitment to operational integrity in high-stakes environments.

information technology & services
51-200
Founded 2022
$58M raised

Description

  • Design, build, and maintain core AI capabilities for the platform.
  • Develop reusable AI functionality for model integration, reasoning, multimodal understanding, structured generation, and evaluation.
  • Optimize AI systems through experimentation, quantitative evaluation, context engineering, and iterative refinement.
  • Build backend services, APIs, and distributed AI systems.
  • Partner with cross-functional teams to deploy scalable AI services for product teams.
  • Prototype emerging AI techniques and turn successful experiments into production capabilities.
  • Debug production issues and improve latency, reliability, observability, and operational performance.
  • Stay current on advances in AI engineering, foundation models, and applied machine learning.
  • Optimize systems for performance, scalability, cost, and reliability.
  • Contribute to a collaborative engineering culture focused on ownership and learning.

Requirements

  • Bachelor’s or Master’s degree in Computer Science, Machine Learning, or a related technical field, or equivalent practical experience.
  • 5+ years of experience building production software systems.
  • Strong software engineering skills with experience in Rust, Python, or similar languages.
  • Proven ability to build scalable backend services, distributed systems, APIs, or data-intensive applications.
  • Hands-on experience integrating large language models or other foundation models into production applications.
  • Ability to design, evaluate, and improve AI systems through experimentation and continuous iteration.
  • Familiarity with modern AI engineering patterns such as structured outputs, tool calling, context engineering, multimodal systems, or AI workflows.
  • Strong understanding of testing, observability, reliability, and maintainability best practices.
  • Demonstrated ability to take ownership of technically ambiguous projects from design through production.
  • Excellent communication and collaboration skills across cross-functional teams.
  • Experience building reusable AI capabilities or shared AI services.
  • Familiarity with deploying, optimizing, or serving open-source foundation models.
  • Knowledge of evaluation frameworks, benchmarks, or datasets for AI applications.
  • Experience with Kubernetes, cloud-native infrastructure, or distributed systems.
  • Experience developing production software in Rust.
  • Familiarity with retrieval-augmented generation (RAG), multimodal AI, AI agents, or model orchestration.
  • Domain expertise building complex AI systems such as multimodal reasoning, long-running inference workflows, AI agents, or model orchestration.
  • US Citizenship or Green Card required due to US government contract requirements.

Benefits

  • $230,000 to $270,000 USD base salary.
  • Remote USA work arrangement.
  • Equal opportunity employment and anti-discrimination commitment.

Interested in this position?

Apply directly on the company website

Apply Now

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